A highly efficient and stable green-emitting mesoporous silica (MP)–(Cs0.4Rb0.6)PbBr3 perovskite composite for application in optoelectronic devices

Abstract

We have, for the first time, reported a highly efficient MP–(Cs_0.4Rb_0.6)PbBr₃ luminescent material for application in optoelectronic devices. MP–(Cs_0.4Rb_0.6)PbBr₃ with red-emitting Sr₂Si₅N₈:Eu²⁺ phosphor is applied to an InGaN blue chip and compared with green-emitting (Cs_0.4Rb_0.6)PbBr₃ perovskite nanocrystals (NCs). MP–(Cs_0.4Rb_0.6)PbBr₃ achieves a conversion efficiency of 80.9 lm W⁻¹ under a forward-bias current of 150 mA. We propose MP–(Cs_0.4Rb_0.6)PbBr₃ as a promising green-emitting material that can replace the conventional inorganic phosphor.